let nixpkgs-lib = import <nixpkgs/lib>; lib = with lib; nixpkgs-lib // builtins // { git = import ./git.nix { inherit lib; }; shell = import ./shell.nix { inherit lib; }; types = nixpkgs-lib.types // import ./types.nix { inherit lib; }; eq = x: y: x == y; ne = x: y: x != y; mod = x: y: x - y * (x / y); genid = import ./genid.nix { inherit lib; }; genid_signed = x: ((lib.genid x) + 16777216) / 2; lpad = n: c: s: if lib.stringLength s < n then lib.lpad n c (c + s) else s; subdirsOf = path: lib.mapAttrs (name: _: path + "/${name}") (filterAttrs (_: eq "directory") (readDir path)); genAttrs' = names: f: listToAttrs (map f names); getAttrs = names: set: listToAttrs (map (name: nameValuePair name set.${name}) (filter (flip hasAttr set) names)); setAttr = name: value: set: set // { ${name} = value; }; toC = x: let type = typeOf x; reject = throw "cannot convert ${type}"; in { list = "{ ${concatStringsSep ", " (map toC x)} }"; null = "NULL"; set = if isDerivation x then toJSON x else reject; string = toJSON x; # close enough }.${type} or reject; indent = replaceChars ["\n"] ["\n "]; # https://tools.ietf.org/html/rfc5952 normalize-ip6-addr = let max-run-0 = let both = v: { off = v; pos = v; }; gt = a: b: a.pos - a.off > b.pos - b.off; chkmax = ctx: { cur = both (ctx.cur.pos + 1); max = if gt ctx.cur ctx.max then ctx.cur else ctx.max; }; incpos = ctx: recursiveUpdate ctx { cur.pos = ctx.cur.pos + 1; }; f = ctx: blk: (if blk == "0" then incpos else chkmax) ctx; z = { cur = both 0; max = both 0; }; in blks: (chkmax (foldl' f z blks)).max; group-zeros = a: let blks = splitString ":" a; max = max-run-0 blks; lhs = take max.off blks; rhs = drop max.pos blks; in if max.pos == 0 then a else "${concatStringsSep ":" lhs}::${concatStringsSep ":" rhs}"; drop-leading-zeros = let f = block: let res = match "0*(.+)" block; in if res == null then block # empty block else elemAt res 0; in a: concatStringsSep ":" (map f (splitString ":" a)); in a: toLower (group-zeros (drop-leading-zeros a)); }; in lib